X-Man Design, is a sub-brand of QiYi.
X-Man Tornado 3x3
The X-Man Tornado is XMD's first ever release. Many reviewers weren't too impressed with it but agreed that it was an "okay" 3x3.
X-Man Shadow 6x6 M
A good 6x6 that is many people's main cube
X-Man Spark 7x7 M
One of the best 7x7s with the Hays 7M and Moyu Aofu GTS/GTSM
X-Man Galaxy Megaminx
The Galaxy Megaminx was released in 2016 and was the dominant Megaminx after its release. It is available in black, white and stickerless. Each color has four versions: regular, concave, convex, and sculpted. There also is a version which has all 4 grips in stickerless. Generally, the sculpted version is preferred over the other three. The stickerless versions have tile-like caps snapped to the primary inside.
X-Man Bell Pyraminx
The X-Man Bell Pyraminx is the second ever mass-produced pyraminx with a magnetic positioning system, as opposed to one with ball bearings. After its release, it became one of the most preferred Pyraminxes on the market. According to X-Man's Website, you can adjust the strength of the magnets by changing the number of magnets on the center pieces, and adding caps on edge pieces. The tetrahedron is available in white with stickers, black with stickers and stickerless.
X-Man Volt Square-1
The X-Man Volt Square-1 was one of the top Square-1 puzzles after its release. Reviews were mixed; many agreed that the QiYi Square-1 was still better while many others agreed that the Volt was a bit better than the QiYi. It is very stable and has a thick slice for grip, similarly to the GuanLong Square-1. Some criticized the Volt for its lackluster corner cutting, but some have been able to set theirs up to improve on that.
X-Man Wingy Skewb
The X-Man Wingy Skewb was immediately well-liked after its release. It became many top Skewbers' mains and was widely considered the single best Skewb on the market soon after. It has a concave shape to help with the solver's grip and magnets to help align the pieces. The closest competition is the MoYu AoYan M.
X-Man Galaxy V2 Megaminx
The Galaxy Megaminx V2 is the successor to the first Galaxy Megaminx. It received positive feedback upon release and a new upgraded version called the X-Man Galaxy V2 L is the new best Megaminx